Perforated-Plate Media, Channel Screen The Aqua Guard ® PF screen is an in-channel screening system that utilizes perforated plate media to efficiently remove a wide range of solids from wastewater. The screen design is built on the Aqua Guard ® filter element belt screen chassis that has been proven successful with over 6,000 installed units in operation. The Aqua Guard PF can be made with the heavy duty “S” chain or the standard duty “MN” chain. Principle of Operation Every perforated plate is configured with a perforated shelf. Solids contained in the wastewater flow are captured on the perforated plate media and carried upward on the plate panels or on the plate panel shelves to discharge at the rear of the unit. At the discharge point, the plate panels are cleaned with a brush assembly and water spray. The drive sprocket has been enlarged to enable the brush and spray to make the most efficient cleaning contact with the panels. No submerged bearings Low power consumption Efficient screen cleaning system Intermittent operation All moving parts can be accessed and serviced above water level Removal of individual perforated panels from the operating deck via access ports Features Benefits Low operation and maintenance costs High capture rates High capacity Ease of installation Less headloss Perforated plate media Ability to build precoat Every panel configured to carry large solids with a perforated shelf Delivered fully assembled No attachment to sides or bottom of channel Aqua Guard design with slack back Side frame ports Flows to 150 MGD in a single unit